Window latch



July 26, 1927. 36 782 O. MILLAURO WINDOW- LATCH I Filed Dec. 18,' 1926 Patented July 26, 192?.

UNITED STATES ORAZIO MILLAURO, OF LONDON, ENGLAND.

WINDOW LATCH.

Application filed December 18, 1926, Serial No. 155,654, and in Great Britain October 25, 1926.

This invention relates to improvements in window latches for sliding windows of the kind adapted to secure the window in any desired position by the separation of. the two sashes.

In such devices as heretofore proposed a bracket has been fixed to the lower sash and provided with means for providing a direct thrust only on the upper sash.

According to my invention means are provided for giving a direct thrust on the upper sash and on the heading of the wlndow frame. Furthermore the device is provided with means for preventing movement of either sash when in the fixed position.

The windowlatch which forms the subject of this invention comprises an openended box-like bracket adapted to besecured transversely to the head of the lower frame. In this bracket slide two blocks mounted on the two parts of a rightand left-handed screw-threaded rod rotatable in the bracket, the outer block having pivoted to one end an extension With a cam surface and the inner block having a transverse lug or pro jcction on one face. I

The cam faced extension of the outer block is adapted to bear against the ad a cent style of the upper sash, and the trans verse lug on the inner block isadapted to bear against the innermost heading of the side frame in which the lower sash slides.

By placing the window sashes in any dc-- sired position and rotating the screwthreaded rod by any suitable means, the two blocks are forced apart thus holding the window firmly. If an attempt is now made to raise or lower either sash of the window, the extension with the cam surface will turn on its pivot and latch the window, preven ing movement thereof.

My invention is illustrated inthe accompanying drawings, in which Figure 1' shows the device with the blocks on the screw-threaded rod separate from the bracket in which they slide;

Figure 2 is a partly sectional Plan of the upper and lower sashes showing the latch in position and one means for rotating the screw-threaded rod; and

Figure 3 is a front elevation of Figure 2 showing alternative means for rotating the screw-threaded rod.

like bracket screwed or otherwise secured by means of the plateA to the head L of the lower sash, and having in one of its vertical faces a slot A In this bracket A slides the rightand left-handed screwthreaded rod B, having mounted on the oppositely screw-threaded parts the blocks C and D. The outer block C has pivoted on its outer end at c a cam faced extension C. which, when in operation, bears against the adjacent style E of the upper sash. The inner block D has a transverse lug D which slides in the slot A of the bracket A and is adapted to bear against the innermost beading F of the side frame in which the lower sash slides.

Each block may be provided with a transverse groove G, so that when the blocks are slid into the bracket A and abut against each other the grooves G are then opposite two holes G in the bracket through which a small pin or screw maybe passed to hold the blocks in the bracket.

The end of the rod B maybe squared as shown at B in Fig. l and a removable key H (Fig. 2) used to rotate the rod, or a sprocket wheel, over which passes a sprocket chain, may be fitted on the end of the rod B as shown at J and K in Fig. 3.

, I claim:

1. A window latch comprising a box-like bracket secured to the head of the lower window sash, two blocks slidably mounted in said bracket and internally screw-threaded, and a rightand left-handed screwthreaded rod engaging said blocks so as to cause them to take a direct thrust on the upper window sash and on the beading of the window frame.

2. A window latch comprising a box-like bracket secured to the head of the lower window sash. two blocks slidably mounted in said bracket and internally screw-threaded, one of said blocks having a transverse lug on one vertical face, a slot in the bracket to accommodate sa-id.lug,-and a rightand left-handed screw-threaded rod engaging said blocks so as to cause them to take a direct thrust on the upper window sash and on the beading of the window frame.

3. A window latch comprising a box-like bracket secured to the head of the lower window sash, two blocks shdahly mounted 1n sald bracket and lnt-ernally screw-threaded one of said blocks having a transverse sion on its outer end, and :prightand lefthanded screw-threaded rod engaging said blocks so as to cause them to take a, direct thrust on the upper Window sash and 011 10 the bending of the window frame. 7

In testhnony whereof I have herelifn'to se my hand this 1st day of December, 1926.

OBAZIO MILLAUR O. 

